Hard Red algae please help

[danieltouchette1964]

Where and did this red algae is coming from.
How do I remove and or control it
Thank you

 

[Carabeo]

It looks like the coveted coraline algae. If the tank is glass, a razor, if not then a plastic scraper. Im behind on mine.

 

[Rick's Reviews]

Double post

 

[Mark Goode]

Have you any to spare?